The Curies were interned in one inch thick lead lined coffins in the Paris Pantheon to protect visitors from ionizing radiation emitted by their bodies. They are expected to be radioactive for the 1,500 year half life of Radium 226...the most stable isotope of radium!
Founder, Director, PI - HP Biomonitoring/ Founding Chair- Radiological Committee Hunters Point Shipyard RAB 2001, Former Attending MD VA Toxic Registry & SFDPH